Improvement in pipe-boring machine



rnounsw; PURCELL, or FOND DU LAC, Wisconsin.

` `Letters ,PatentV No. 106,077, dated VAugust 2, '1870.

HOF- IMPROVEMENT' IN PIPE-BORING MACHINE.

t The Schedule referred to in these Lettere Patent `and. making part of .the same.

To all 'whom it 'may concern;

Be it known that I, THOMAS W; ruegen, of'rona .du Lac, in the county of Fond du Lac and. State of Wisconsin, have invented an Improved Pipe-boring Machine; and Ido hereby declare -that the following e is a fnll,clear, and exact description thereof, reference being had to-the accompanying `drawingand to the letters of referencev marked thereon.

i Drawing. Figure 1 is a plan or `top View of my improved mai chine, showing the frame-work upon which the parts rest, the mechanism for driving the augeror boringcylinders, a portion of the outer one being cut away, to show the construction of the interior auger;

Figure 2 is a longitudinal elevation of a portion of t the interior auger, showing the adjustable cutter upon its outer end; l

j l Figure 3 is an endview of the interior auger, showi mg the meansof securing andfadjusting the cutter,

and of securing it in position; and Y Figure 5 isan end view of the outer auger or boring-cylinder. l i

Corresponding letters refer to corresponding `parts in the several figures.

This invent-ion relates to that class ofmachines which lsused for borngpipes, pump-logs, and for l other Esimilar purposes; and Y l It consists in the construction, conibination,'a1 idar` l rangement of the parts ofn'hich it is composed, .as will be more fully explained hereinafter.-

A in the drawing refers to the frame-Work 1,01A in any other convenient manner, it being provided with a bearing, A', near its outer end, for the outer auger or boring-cylinderto revolve in, and nearits inner end with one or more, `for the saine purpose, as shown at A1 A?. These bearings A1 A2 extend from one ot' the side pieces ofthe frame `to the other, 4and serve to `keep them in position'. i y

distance ,suiic-ient to enable them to form the bearings `for thel countershaft `which drives the machine.

B refers to the count-ershaft, which has upon it two ,pnlleys, B1 andBz, fromwhich belts pass `tothe pul-V leys upon the rear ends ofthe angers.

"1 Motionmay beimparted to the 'shaft in any of the `known 1nethods,and from any prime mover; One of f the pulleys upon this shaft should be of greater diameter than the other, soasto give to the interior auger or cutter a more ,rapid movement than is given to `)digue/4 is an elevation ci' the adjustable cutter; t

df the" machine, which ymay be constructed as show'n in the outer one, or this difference of speed may be regulated by the pulleys upon thcrcarends of the'augers.

gers or cutters', they being so arranged as to receive,

their motion from the vvpulleys upon-the countersh'aft.' D .D refer to belts, which communicate the motion `of the countershaft to the angers or cutters, one ofk then; being crossed, (when belts are used,) in order that 'one 'ot'thecnttiers shall be caused to rotate in a direction opposite tothat in which the other is moiin'g, in orderthat the chips may be1 carriedthrough between tl'ien1,vvithout being allowed to clog or choke the passage. A j 'j E refers to a cylinder of metal, the outer surface of which should he `turned o i'I" to the diameter of the hole, which itis intendedto bore,'or a little less, in 'order that it may. pass freely, through the hole formed by the cutter upon its outer end.

This cylinder is mounted iu-the bearingsAlA and A, its 'rear end being provided with a pulley or gearwheel, for giving motion to the same. The interior sin-facev of this ,cyl'inder is to be bored out, to receive the interior cutter or auger. 'l j t E' ,refersv to acutter-head, which is to be secured to the outerend offcylinfderE, by'beingscrewed thereon, or yin 'any othersuitahle Vinaunfar,L This head has a portionof its out-ei; euch-cutaway, 'as shown in figs. l

vend .Q 'l'ta ohasfan aperture through its front or the' passage-of the core, which it leaves thepipe or log in boring the same'. 4"ort ufo the'end surface upon-whicll the cut-v outnr @et "ting4edge'isformed,lis made to` project beyond the other .poi-tions, to i th( c x tent of the thickness ofthe chip that it isdesiredtocut, Whichwill vary according to the kind of woodto be bored.

Separate cutter-heads may be' provided for the va- ,rions kindsiof material or wood to be used,;and such heads may have their cutting-edges projecting. more or less, according to circumstances. 11 refers to a tube orl cylinder, which is placed within theouter on e,va n d is driven-in airopposit-e direotion from it by means ot' pulleys on its rear end. 4The aperturejinV thecenter of this cylinder is of any size that itmay be desiable to have the core which there, said inner cylinder being made to revolve at a greater speed than the outer one, forthe purpose of facilitating such operation.

F refers to an adjustable cutter, which is attached to the outer end of the interior cylinder, and is so arranged that its inner cutting-point may be extended inward beyond the inner surface of such cylinder, in order that the core may be reduced to such a diametcr that it will pass freely through it,and not be retarded by frictional contact with its surface.

Figs. 2, 3, and 4 show the construction and arrangement of the cutter, and the means for attaching it to the end of the cylinder, and iig. 1, its arrangement within 4the outer cylinder aud its cutting-head, said arrangement being suoli that, as the chips or cuttings pass backward from the outer head, they are taken hold pf by the cutter on the inner cylinder, and at once reduced in size to such au extent that they will `freely pass through the spacebetween the inner cylinder, the worm or threadthereon, and the outer cylinder.

Having thus described my invention,

What I claim,l and desire to secure by Letters Patent ofthe United States, isy The combination of the outer cylinder E, cutter E' thereon, inner worm-cylinder F, and adjustable cutter 14" thereon, substantially as and for the purpose set forth.

In testimony whereof I haveliereunto signed my name to this specification in the presence ot' two att-esting witnesses, this 23d day of May, 1870, at Fond du Lac, \Visc0usin.

lVitnesses:

A. N. WHITE, SoLoN W. EDsoN.

lTHOMAS W. PURCELL. 

